MXPA02003878A

MXPA02003878A - Absorbent article with main absorbing part in front portion.

Info

Publication number: MXPA02003878A
Application number: MXPA02003878A
Authority: MX
Inventors: Drevik Solgun
Original assignee: Sca Hygiene Prod Ab
Priority date: 1999-11-18
Filing date: 2000-11-17
Publication date: 2002-10-23
Also published as: EP1244408A1; DE60018976T2; DK1244408T3; WO2001035888A1; SE9904198L; RU2259810C2; FR2801195A3; PE20010653A1; AU1566201A; AR026440A1; PL355509A1; ATE291406T1; PL206555B1; EP1244408B1; ES2239049T3; DE60018976D1; TNSN00220A1; US6908456B1; SK5022002A3; RU2002116219A

Abstract

The invention relates to an absorbent product with a longitudinal direction and a transverse direction, two side edges (109, 110) extending essentially in the longitudinal direction, a front portion (114), a rear portion (115), a first surface and a second surface, and an absorption body (105) arranged between the first surface and the second surface. The absorbent product is essentially triangular in shape, the front portion (114) being wider than the rear portion (115). The absorption body (105) also has a main absorption part (106) which is shaped and positioned in such a manner in the plane of the product that at least 85 % of the total absorption capacity of the product is in the front three quarters of the length of the product and at least 70 % of the absorption capacity is found in the front half of the product.

Description

ABSORBENT ARTICLE WITH A PART OF MAIN ABSORPTION IN THE FRONTAL PORTION. TECHNICAL FIELD The invention relates to an absorbent product such as a sanitary napkin, a brief with a liner or lining or an incontinence pad with a longitudinal direction and a transverse direction, two ends of side edges extending essentially in the longitudinal direction, a front portion, a first surface and a second surface, and an absorption body accommodated between the first and second surface in which the product is essentially triangular in shape, the front portion is wider than the rear portion.

BACKGROUND OF THE ART Absorbent products such as sanitary napkins, underpants with lining or lining and incontinence pads are intended to be used in close contact with the wearer's body. In this regard, such an absorbent product is usually accommodated within the wearer's underpants and kept in contact with the body during use by the pressure of his underpants. However, it is more common for women to wear what is known as a leather strap or strap, that is, underpants in which the back portion of the crotch portion is very narrow. In this regard, sanitary napkins, lined underpants and incontinence pads that are designed to be attached to conventional underpants are intended to be virtually impossible to secure on a leather strap or strap in such a manner that the towel or underpants with lining fit properly in relation to the user's body and more still hold in one position throughout its use. Additionally, the leather strap or strap is often used for aesthetic reasons because they are virtually invisible even under long clothing and do not cause unsightly lines or wrinkles on clothing. With a conventional absorbent product that is designed beyond the ends of the leather strap or strip, of course a large part of the desired unsightly effect of wearing a korea or leather strip is lost. Therefore, absorbent products have been produced that adapt to the shape of a leather strap or strip. Such absorbent products are described in SE 9803981-1, WO 97/39713 and SE 9901758-4. However, the special triangular shape with a very narrow back portion that is necessary for a product to fit into a leather strap or strap means that the area of the surface available for absorption is relatively small. The risk of leakage or leakage is then increased if the body of absorption is not able to capture and absorb all the discharge of body fluid. Therefore, an object of the present invention is to provide an absorbent product which is suitable for use in conjunction with an adjusting leather strap or strip and which provides a high degree of tamper-proof security. Another object of the invention is to produce an absorbent product that is flexible, comfortable and discreet to wear.

BRIEF DESCRIPTION OF THE INVENTION By means of the present invention, an absorbent product of the type mentioned in the introduction has been produced, in which the product essentially eliminates the problems mentioned above, associated with the absorbent products for the purpose of being used with the belt. or leather strip. A product according to the invention is mainly characterized in that the absorption body has a main absorption part which is essentially flat and is adapted and placed in such a way that the flat surface of the product has at least 85% of the Total absorption capacity of the product is three-quarters of the front of the product's length and at least 70% of the absorption capacity is in the front half of the product. By concentrating the absorption capacity in an area of liquid absorption, primary, in which the liquid can be absorbed and stored, it is possible to limit and control the diffusion of the liquid in the absorbent product. As the product is used at the end of a leather strap or strap to adjust, on account of the very special shape of the leather strap or strap, it will fit tightly into the user's genitals and vaginal orifice. It has also been found that the narrow back portion of the leather strap or strap tightens the product against the wearer's body so that a very effective backward seal of the perineum is obtained. By virtue of the fact that the main absorption part of the product is essentially triangular, the body fluid absorbed in the first site will be transported towards the broad part of the main absorption part. As a result, an absorbent product according to the invention is leak proof combined with a high degree of discretion and comfort. It is advantageous if the main absorption part consists essentially of a finer capillary and / or more hydrophilic material than the surrounding secondary absorption part, or if the main absorption part comprises superabsorbents, this means that because the liquid will be transported in the direction of the absorption part secondary to the main absorption part and not in the opposite direction. As a result, the ends of the main absorption part also function as barriers for the transport of the liquid so that the liquid does not pass from the main absorption part of the sponge or fluff and / or minor hydrophilic secondary absorption part until the Part of main absorption is saturated with liquid. It has been found that the part of the main absorption is essentially triangular in shape with the broad part arranged in the main portion of the product and the covering or lining of the narrow part of the rear portion of the product, the absorption capacity will be concentrated towards the The main portion of the product and the diffusion of the liquid in the product will take place essentially in the front direction.

According to one embodiment of the invention, the product comprises a secondary absorption part, the secondary absorption part extends outside the main absorption part in the product plane, at least within the rear portion of the product, the area of secondary absorption counting when more 25% of the capacity of absorption of the product. The secondary absorption area constitutes an impediment to the flushing of the body fluid from the ends of the product and still more to serve as a safety zone that can absorb small amounts of liquid that can extend the portions of the ends of the product and the narrow part. of the back portion of the product. According to one embodiment, the secondary absorption part comprises portions surrounding the main absorption part in the product plane. The suitable material for the main absorption part is one or more layers of cellulose fibers with a density of at least 150 g / dm3. In this regard, a particularly suitable material consists of cellulose fibers formed by drying with a density of at least 250 g / dm3. It has been found suitable for the secondary absorption part to include a layer of pulp-based material or papermaking material combined with a density of at most 125 g / dm3. In this regard, the blended material means that the fibrous material which is bound by a binder which is arranged on one or both surfaces of the layer of the material or the layers of the cellulose fiber containing a proportion of binding fibers which are activated to stabilize the fibrous structure. The combinations of the different types of binding or binding methods are also possible. The secondary absorption part can be arranged on the first surface of the product and extended in the main absorption part and behind the ends of the primary absorption area around the total periphery of the main absorption part, or be arranged only around the periphery of the main absorption part.

To prevent the accumulation of liquid and counteract filtration in the rear portion of the product, it has been found suitable for the main absorption part to end up in the rear portion of the product at a distance from the rear end of the product constituting at least 10% of the product. total length of the product. In this regard, it is suitable for the most posterior part of the posterior portion to include a soft compressible material. Such a material serves several functions, for example, it increases the comfort of the product, imparts firmness to the posterior portion that is very narrow and constitutes a barrier to filtration. It may also be suitable for the most posterior part of the posterior portion that has a certain capacity to absorb liquids of the size of the individual drops of the liquid.

BRIEF DESCRIPTION OF THE INVENTION The invention is described in greater detail below with respect to the exemplary embodiments shown in the appended drawings in which Figure 1 shows a sanitary napkin according to a first embodiment of the invention; Figure 2 shows a section along the line II-II through the sanitary napkin in Figure 1, and Figure 3 shows a sanitary napkin according to a second embodiment of the invention.

MODE (S) FOR CARRYING OUT THE INVENTION The sanitary towel 101 shown in Figures 1 and 2 comprises a layer 102 with a liquid-permeable surface, arranged on the side of the sanitary napkin which is intended to protect a user during its use, a layer 103 of the liquid-impermeable back side positioned at the end of the sanitary napkin to be protected, away from the wearer during use, and an absorption body 104 included between the two layers of the surface 102, 103. The layer 102 of the liquid-permeable surface has the same shape and size as the absorption body 104. The layer 103 of the rear end also has a shape similar to the absorption body. The layers 102 and 103 of the surface are connected to the absorption body 104 for example by gluing, mending, sewing or by welding using heat or ultrasound.

The liquid-permeable surface layer 102 is of the conventional type and may therefore consist of any liquid-permeable material suitable for the purpose. Examples of such material are the different types of nonwoven material, perforated plastic films, netting material, liquid permeable foamed material or the like. The liquid-permeable surface layer 102 can be constructed from two or more different materials to provide different functions in the surface layer. For example, it is customary to place a layer that transports the liquid inside a layer that receives the liquid. It is also known to place different types of material on different parts of the surface of the sanitary napkin that protect the wearer during its use. Therefore, a material with an adequate admission capacity can be advantageously accommodated in that portion of the sanitary napkin which is supposed to moisten first by the majority of the body fluid while the portions of the surface layer which are in the region are provided. first instance to constitute a contact surface next to the user's body with a material that has been optimized with respect to softness and benignity to the skin. In any case, it is not necessary for the invention that the layer 102 of the liquid-permeable surface consist of a layer of separate material, but that the layer 102 of the surface may be a surface in the absorption body 104 of the sanitary napkin 101. The liquid-impermeable back layer 103 may also consist of any liquid impervious material. Particularly advantageous materials are thin plastic films, liquid impervious nonwoven materials, or materials that are coated with materials that are impervious to liquids such as wax, resin, adhesives or the like. It is also possible to use laminates of liquid impervious material. It may be desirable, for example, to provide the back side of the product with an outer layer of a natural fabric, for example, a layer of nonwoven material. Such a non-woven material provides a soft, skin-friendly textile surface and grants advantages such as a high degree of user comfort, high friction and therefore better retention in the leather strap or strip. Additionally, it is frequently considered that a textile surface has an aesthetically attractive appearance. It is also an advantage if the liquid-impermeable back layer 103 is breathable, ie it allows the gas and water vapor to pass through the layer.

It is not necessary for the invention that the layers of the surface and the absorption body have the same extent on the flat surface of the product. Therefore, a possible alternative is to include the absorption body in a conventional manner between the two layers of the surface with a little more extension on the flat surface than the absorption body. In such a mode, the layers of the surface are interconnected within a projection in conjunction with the edge around the absorption body. Such bonding with the edge can occur for example by gluing, sewing or welding using heat or ultrasound. The absorption body 104 consists of two parts, a first part constitutes the main absorption part 106 of the absorption body 104, and a second part that is relatively thin and is in the shape of one or more layers of materials that extend essentially on the total surface of the sanitary napkin. During the use of the sanitary towel 101, it is accommodated in the genital area of the wearer, with a portion located in the region of the vaginal orifice of the wearer. As a result, the discharged body fluid will concur in the sanitary pad 101 within a predetermined area of greater amplitude and limited in the sanitary napkin, which is known as the wetting area. The position of the main absorption portion 106 is selected such that it coincides with the anticipated wetting area of the sanitary napkin 101. The main absorption portion 106 is therefore considerably smaller than the sanitary napkin as a whole. One virtue is the fact that the main absorption part 106 is positioned in the wetting area of the sanitary napkin, however, essentially all the body fluid discharged in the sanitary napkin will still pass and be absorbed in the main absorption part. Therefore, it is of the utmost importance that the main absorption part 106 has a sufficient absorption capacity to be able to absorb the expected amount of body fluid. In this regard, the absorption capacity in the main absorption part 106 should be at least 75%, and preferably at least 85% of the total absorption capacity of the sanitary napkin. It is usually estimated that a panty with liner or coating would have an absorption capacity of approximately 3-5 ml and a sanitary napkin should be able to absorb approximately 12-15 ml. For products intended to be used, for example, at night, or for incontinence pads, a greater absorption capacity is desirable. The main absorption part 106 is essentially triangular in shape and is positioned in such a way that the widest part at the base of the triangle will cover the user's abdomen when the sanitary napkin is placed inside the leather strap or strip. This means that the liquid that is in the part of the main absorption 106 will be absorbed towards the main part of the sanitary napkin, in which the greater amount of the absorption material is located. As a result, the liquid is prevented from running backwards and out of the sanitary napkin. The second part of the absorption body 104 is accommodated as a layer between the liquid permeable surface layer 102 and the main absorption part 106 and serves as a liquid transfer layer 108 between the surface layer permeable to the liquids 102 and the main absorption part 106. The second part of the absorption body 104 also extends behind the ends of the main absorption part 106 on the flat surface of the product, around the total periphery of the main absorption part 106 and then constitutes a secondary absorption part 107 around the main absorption part 106. The absorbent materials suitable for use in the absorption body 104 are, for example, fluffy cellulose pulp, layers of absorbent blended fiber, fabric layers, Absorbent foam, peat or similar. The absorption body 104 may also contain superabsorbent polymers, this means polymers with the capacity to absorb several times their own weight of the liquid forming a gel containing liquid. The superabsorbents are usually in the form of particles, flakes, fibers, granules or the like. The superabsorbent material can be used alone or with another absorbent material. The materials in the main absorption portion 106 and respectively the secondary absorption portion 107 are advantageously selected in such a way that the main absorption portion is capillary finer and / or has a higher hydrophilicity than the secondary absorption portion. A capillary-thin material can be produced, for example, by compressing a pore, a compressible structure such as a fiber interlining, or by selecting a material with small pores. Generally, they can be structures with a large proportion of thin fibers that have finer capillaries than fibrous structures with a large proportion of coarse fibers. In a similar way, a difference in hydrophilicity can be obtained either by the treatment of the material chemically or physically or by the selection of the starting materials having different hydrophilicity. To achieve the desired effect of rapid intake of liquid from the main absorption part 106, higher . capacity of absorption and retention of liquids in the main absorption part 106, as well as little or no diffusion of the liquid absorbed from the main absorption part to the secondary absorption part 107 and the liquid transfer layer 108, therefore, The main absorption part 106 should include hydrophilic material with a higher absorption capacity such as cellulose fibers, superabsorbent material or the like, while the material in the secondary absorption part 107 and the liquid transfer layer 108 can be selected from materials with Very low absorption capacity for example, fiber interlining of synthetic fibers. A material that functions particularly well as an absorption material in the main absorption part has been found to be the fibrous cellulose material formed by drying described in WO 94/10956. The materials that have proved to work particularly well as a secondary absorption material are the combined materials based on cellulose fiber with a density of at least 125 g / dm3. As mentioned, the secondary absorption part 107 surrounds the main absorption part 106 around its total periphery. As a result, the secondary absorption part 107 forms a safety zone that can capture and absorb small amounts of liquid, which brings the sanitary towel out of the wet area. Due to its low capacity to transport liquids, the secondary absorption part 107 also prevents the liquid from penetrating the edges of the sanitary napkin and causing filtration. Since the main absorption part 106 has a greater absorption capacity in relation to its area, this area usually has relatively higher stiffness. The secondary absorption part 107 then serves the additional purpose of providing a soft protection between the main absorption part 106 and the body of the wearer. It may also be suitable to make the transport of liquids on the flat surface of the sanitary napkin even more difficult by providing the sanitary napkin with some form of liquid barrier which prevents the liquid from being transported in the absorption material or in the waterproofing layer. Liquid permeable surface 102 at the same ends of the sanitary napkin. Examples of such liquid barriers are compressors, sealants, adhesive tapes, collapsible plastic tapes or means for melting hydrophobic materials such as wax or the like. In this regard, liquid barriers can be accommodated along the ends of the sanitary napkin and / or along the ends of the main absorption portion 106.

As can be seen in Figure 1, the sanitary napkin 101 is designed with a relatively wide front portion 114 and a substantially narrow rear portion 115. The sanitary napkin 101 also has two side ends 109, 110, the main length which is in the longitudinal direction of the sanitary napkin and an essentially transverse front end 111 and a similar transverse rear end 112. During the use of the sanitary napkin 101, the front portion 114 is the part of the sanitary napkin that covers the front of the wearer and will then be accommodated in the genitals of the wearer. The front narrow portion 114 in the forward direction of the rear portion 115 is considerably narrower than the front portion 114. So that the sanitary towel does not extend to the back during use, which is inconspicuous when used in conjunction with a strap or leather strip is suitable for the back portion 115 of the sanitary napkin having a length between 80 mm and 140 mm and the total length of the sanitary napkin does not exceed about 260 mm. To secure the sanitary napkin in a pair of underpants, a security means 116 is accommodated outside the back end layer 103 of the sanitary napkin. The security means 116 are in the form of adhesive adhered adhesive longitudinal strips. Before its use, the security means 116 are protected in a conventional manner, for example by coating a protective layer of paper or plastic treated with silicone or stamped so that it can be easily peelable from the adhesive when the sanitary napkin is used. Naturally, the adhesive can be accommodated in any form suitable for the purpose. Other types of security means may be used such as friction liners, snap buttons, clips, security locks or the like. Another alternative is a security adhesive that is attached to the user's body. Different types of security arrangements can be combined with each other. It is common, for example, to provide a sanitary napkin with both safety adhesives in the backside layer with securing seals. However, the absorption body 104 as shown in the figures is constructed from two separate parts, it is possible to make the absorption body 104 from a simple absorption layer that imparts greater hydrophilicity and / or more compact structures within the main absorption portion 106. A greater absorption capacity within the main absorption portion 106 may be approximately by means of an accumulation of the absorption material within this area and / or addition of superabsorbents.

.. Figure 3 shows a sanitary towel 301 according to another embodiment of the invention. The sanitary napkin 301 shown in Figure 3 comprises, according to the shape of the sanitary napkin 101 in Figures 1 and 2, a permeable surface layer 302 and a rear end layer 303 with an absorption body 304 accommodated between the layers 302, 303 of the surface. The layers of the surface 302, 303 extend around the periphery of the absorption body 304 on the flat surface of the sanitary napkin 301 and are interconnected within the portions of the outgoing end 305. Similar to the sanitary napkin 101 shown in Figures 1 and 2, the sanitary napkin in Figure 3 comprises a two-part absorption body 304, an upper layer located immediately inside the liquid-permeable surface layer 302 in the first part constituting a liquid transporting layer 308 for transporting the liquid forward to a main absorption part 306 which is inside and on the other hand forming a secondary absorption part 307 projecting around the ends of the part of main absorption 306. Therefore, the main absorption portion 306 is accommodated between the upper part 307, 308 of the absorption body 304 and the rear end layer 303.

The sanitary napkin 301 has a broad front portion 314, a substantially narrow rear portion 315, two side ends 309, 310, a front end 311 and a short rear end 312. When the sanitary napkin is worn, it is placed in a pair of underpants with the front portion 314 accommodated in the front part of the crotch of the underpants that is, the part that the wearer places towards the front, towards the abdomen and with the rear portion accommodated in the back part of the crotch of the underpants, is say the part of the underpants that cover backwards towards the buttocks. As can be seen in Figure 3, the main absorption part 306, is amply explained, essentially has the same shape as the sanitary towel 301. However, the main absorption part 306 does not all extend in the back line to the rear part 312 but ends at a distance from rear end 312 which is at least 10% of the total length of sanitary napkin 301. As a result, a small area 317 is formed on the back of rear portion 315, within wherein the area 317 of the sanitary napkin 301 has an extremely low absorption capacity because only the secondary absorption part 307 occurs in the rearmost area 317. The secondary absorption material then serves to capture small amounts of liquid that they can reach the area 317 of the rear portion 315, and constitute a soft and comfortable part that is easily molded to the user's body and on the other hand does not rub and irr ita the user's skin. As discussed with respect to the sanitary napkin 101 shown in Figures 1 and 2, the material in the secondary absorption portion 307 should be selected such that essentially no transfer of the liquid takes place in the direction of the absorption part. 306 to the secondary absorption portion 307, as a result of the secondary absorption portion 307 within the posterior area 317 also constitutes a barrier against filtration of the liquid in the posterior portion 315 of the sanitary napkin 301. The sanitary napkin 301 shown in FIG. Figure 3 also has safety latches 318, 319 which are centrally accommodated in the longitudinal direction of the sanitary napkin along the lateral ends 309, 310. The safety latches 318, 319 pretend that when the sanitary napkin is accommodated in a pair of underpants, fold around the ends of the leg of the shorts and secure to the underpants, or the same in the crotch of the underpants. For this purpose, the security latches 318, 319 are suitably supplied with separate security means eg adhesives or a contact closure fastener. Such security means are not shown in Figure 3. It is also possible to use security locks without separate security means. It is known, for example, to use safety seals that are secured to the absorbent product with the free portion of the seals directed on the back end layer of the start. Such safety latches are automatic latches and are pressed against the underside of the product when the product is inclined in the longitudinal direction for example when it is accommodated in a pair of underpants and then molded to the wearer's body. Naturally, the security locks do not have the shape or size shown in Figure 3. Instead of these, other types of security locks can be used. Of course, it is also possible to omit the security locks on the sanitary napkin 301 shown in Figure 3. The sanitary napkin is similar to that shown in Figures 1 and 2, it is also supplied with a security means accommodated in the rear end layer 303 for securing the sanitary towel in the wearer's underpants. The security means are not visible in Figure 3. However, the invention is described with respect to sanitary napkins, of course they can be applied to absorbent products such as incontinence pads and underpants with lining or lining

Claims

CLAIMS 1. An absorbent product with a longitudinal and transverse direction, two lateral edges extending essentially in the longitudinal direction, a front portion, a rear portion, a first surface and a second surface, and an absorption body accommodated between the first surface and the second surface, which product is essentially triangular in shape, the front portion is wider than the rear portion, characterized in that the absorption body has a main absorption part which is adapted and placed in such a way in the flat of the product that at least 85% of the total absorption capacity of the product is three-quarters of the front of the product length and at least 70% of the absorption capacity is in the middle of the front of the product.
2. The absorbent product according to claim 1, characterized in that the main absorption part is essentially triangular in shape with the widest part accommodated in the front portion of the product and the narrow part is in front of the rear portion of the product.
3. The absorbent product according to claim 1 or 2, characterized in that the product comprises a main absorption part, the secondary absorption part extending outside the main absorption part on the flat surface of the product, at least within the posterior portion of the product, the secondary absorption area that takes into account _when plus 25% of the total absorption capacity of the product.
4. The absorbent product according to claim 3, characterized in that the secondary absorption part of the product comprises portions that completely surround the primary absorption area on the flat surface of the product.
5. The absorbent product according to claim 3, characterized in that the secondary absorption area comprises a fibrous cell layer based on cellulose with a density of at most 125 g / dm3.
6. The absorbent product according to claim 5, characterized in that the secondary absorption part accommodates on the first surface of the product and extends over the main absorption part and beyond the edges of the main absorption part, around the total periphery of the main absorption part.
7. The absorbent product according to one of the preceding claims, characterized in that the main absorption part comprises a layer of cellulose fibers with a density of at least 150 g / dm3.
8. The absorbent product according to claim 7, characterized in that the main absorption part comprises a layer of dry-formed cellulose fibers with a density of at least 250 g / dm3.
9. The absorbent product according to any of one of the preceding claims, characterized in that the main absorption part is not present in the portion of the posterior portion located near the trailing edge, which corresponds to at least 10% of the total length of the product.